I'm running CumulusMX 3043 hooked up to a Davis Vantage Pro (yes, old school) and it's been running pretty flawlessly for over a year now. One small issue has cropped up sometime in the last few beta releases that I just haven't been able to quite figure out: my UV and solar radiation readings end up maxing out. Even as I type this at 1:17 AM CDT in the middle of the night, my CumulusMX station is reporting a UV of 16.0 and solar insolation of 1775 W/m2.

I have no solar radiometer hooked up to my station or configured in CumulusMX. Any ideas why this might be happening, or is it just something I'll have to learn to live with?

The MX interface is completely user editable. So if there are items being displayed for sensors which you don’t actually have (which I think is what you’re saying), you can edit the files in the interface directory so that they aren’t displayed. Or, if you don’t feel able to do that, you can just ignore them. But I’m sure someone on the forum would be able to give you a nudge in the right direction.